Alarm



F. C. STINZING.

ALARM.

APPLxcAtloN FI'LED MAY 4. 192|.

Patented Spt. 5, 1922.

Patented Sept, 5, 1.922.

SATES FRANK C. STINZING, OF NEW YORK, N. Y.

ALARM.

Application iled May 4, 1921. Serial No. 466,778.

To all LU/tom t may concern.'

Be it known that l, F RANK C. S'riNzING, a citizen of the United States,and resident of the borough of Bronx, in the city, county, and State ofNew York, have invented certain new and useful improvements in Alarms,of which the following is a specification.

This invention relates to alarms whereby the attempted, unauthorizedemployment of any mechanical device may be audibly announced, as by theproduction of a shrill whistle, for the purpose of preventing` theft. l

Briey expressed the alarm consists of a whistle structure, operable by acharge of compressed air, under the control of a setting valve, that isprovided with suitable locking means, to Vrender its operationunavailable by other than authorized persons. The whistle is furthercontrolled by an automatic valve which is arranged to open by the actionof a moving part of the mechanism to be guarded, whereby thel operationof such mechanism, when the setting valve has been opened, will causethe whistle to be sounded, and to continue sounding as an alarm untilthe setting valve isl closed.

Other features and advantages of my invention will hereinafter appear.

In the drawing z- Figure 1 is a horizontal sectional view of my alarmapparatus, and

Fig. 2 is a vertical section on the line 2-2 of Figure 1.

In the drawing I have shown my improved alarm as applied to anautomobile, to prevent the theft thereof, this example serving toillustrate the general principle whereby also other moving objects maybe guarded.

In carrying out my invention l provide a container for compressed air,said container being here indicated as a cylinder 1, having closuremeans 2 at one end, and, at its other end connecting by means of asuitable duct 3 (which may be of glass or other frangible material),with a valve chamber 4, having a valve 5 that is capable of automaticoperation.

The entrance to duct 3 is covered by a valve seating member 6, havingaligned orifices to provide communication between cylinder 1, and saidduct, a valve 8 tting in said seating member 6, to normally Shutautomatic y olf communication, but having a transverse orifice toregister with orifices 7 and thus open up communication. y

The valve 8, here shown as conoidal in form and revoluble in seatingmember 6, is provided at one end with a squared recess 9, to receive thesquared shank 10 of a revolu- `ble lock member 11, that is capable ofactuation as by means of a key 12, or by other suitable means, for thepurpose of turning valve 8 between its open and closed'positions.

When the valve 8 is open, it will be ap? preciated that if valve 5 alsobe opened, a flow of air under pressure will escape from cylinder 1.This pressure flow is utilized by me to actuate a whistle that islocated in the cylinder in advance of the valve seating member 6. As anexample of whistle structure which may be employed I have shown a hollowcylinder 13, containing a diaphragm or reed 14, and having a neck por-ytion 15 that is covered by a disk 16, said disk being of smallerdiameter than said cylinder, and lying within `the throat portion 17 ofa conoidal member 18, that lits within the cylinder 1 inthe manner of apartition. A slight clearance 19 is left be tween the peripheral edge ofdisk 16 and the wall of portion 17, causing air to .flow in an annularstream through said clearance, for impingement against the peripheraledge of cylinder 13, and resulting in the production of a shrillwhistling sound.

To prevent tampering with the cylinder 1 it is made of great strengthand is capable of containing air compressed to a large number ofatmospheres. Therefore the relief means, in whose path the whistle islocated, may be regulated. by pressure reduction means, such as thatindicated at 20, whereby the compressed air supply may be conserved, andthe serviceability of a cylinder charge prolonged.

The duct 3, here shown as an elbow tube, its into a socket portion 21forming part of valve seating member 6, and a tight union therefor iseffected by means of a stufling box in the form of a cap 22.

Also, the opposite end of tube 3 is entered into tight union with valvechamber 4 by means of a stuffing box 23, of similar character.

The valve 5, which is of concavo-convez form, has a spindle 24,revolubly centered i! a spider 25, lying across the valve chamber 4, andis outwardly urged against an annular' seat 26 upon which it is adaptedto rock, in any direction. Said valve 5, when rocked, in any direction,serves to open a passage between it and its seat 2G, thus permittingescape oi air to the atmosphere from tube 3, and thereby enabling` theWhistle to sound an alarm.

For its automatic actuation the valve 5 is provided with an arm 27, thatmay be disposed to lie in the path of any movingh object Whose movementit is desired to have detected or signaled by an audible alarm.

Thus, in the example given in the drawing the arm 27 is shown asprojected between adjacent spokes 28 ot' a Wheel 29, that forms part or'an automobile; in this example, also, the alarm apparatus being suitablymounted on the automobile chassis 30` as by fastening means 31. f

As Will be readily understood, the owner, or person authorized tooperate the automobile, will insert the key 12 in loch member 12 andturn valve 8 to open the passage between cylinder 1 and tube 3, irsthaving` adjusted valve 5 upon its seat `26 to close the outlet, and inthis act causing the arm 27 to be entered between the Wheel spokes.

The air pressure ot cylinder 1 will there` by be communicated to tube3,. and the alarm will be set. Thereafter, should the automobile bemoved the turning` ot the Wheel will roch arm 27,.thereby shitting thevalve from its seat and opening the valve passage, whereupon the rush ofcompressed air past the Whistle Will operate the latter,

calling the attention o'l persons Within hearing1 to the tact.

Should the intending` thief attempt to tamper with the alarm, he maybreak the `glass tube 3, but that would not silence the Whistle, Whichcan only be shut off by turning the valve 8, reepiiring` the use oit theowners key. v

rlhe cylinder 1 may be recharged as through an orifice in valve chamberel, which can be normally sealed with a plug (not shown). f

Variations Within the spirit and scope ot my invention are equallycomprehended herein.

l claim 1. An alarm for indicating` the unauthorized moving` ot a motorvehicle comprising a compressed air supply, controlling valve therefor,Whistle, pressure release. means, and fixed means co-acting with atraction Wheel of the motor vehicle to actuate the pressure releasemeans, for sounding the Whistle.

2. An alarm for indicating the unauthorized moving of a motor vehiclecomprising' compressed air suppl, a controlling, valve therefor, lockingmeans for said valve, a Whistle, pressure release means, and fixed meansco-acting with a traction Wheel ot the motor vehicle to actuate thepressure release means, .tor sounding the Whistle.

Signed at the borough of Manhattan in the city, county and State of NewYork this 3rd day of May A. l). 1921.

FRANK C. STINZING.

